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Sedimentation, cleavage and tectonic thinning in the aberystwyth grits between clarach and wallog, cardigan bay
Author(s) -
Wood Alan
Publication year - 1981
Publication title -
geological journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.721
H-Index - 54
eISSN - 1099-1034
pISSN - 0072-1050
DOI - 10.1002/gj.3350160106
Subject(s) - geology , tectonics , bay , cleavage (geology) , outcrop , ordovician , geochemistry , fold (higher order function) , lithification , geomorphology , seismology , paleontology , sedimentary rock , oceanography , fracture (geology) , engineering , mechanical engineering
In recent years the folding and cleavage seen in the Aberystwyth Grits has been ascribed to downslope movement in soft unlithified sediment, not to tectonic forces. A detailed examination of folded beds in a small part of the outcrop was undertaken to test this theory. It is concluded that the folding and cleavage was initiated by movement from a rising tectonic ridge, but that the sediments may not have been completely lithified at the time of folding.